Fifield Companies. EIR Technical Transmittal January 6, 2005 MACTEC PROJECT

Transcription

1 Fifield Companies. EIR Technical Transmittal January 6, 2005 MACTEC PROJECT September 20, 2004 Fifield Realty Corp Main Street, Suite 610 Irvine, CA Attention: Mr. David K. Robbins, Executive Vice President & Principal Subject: TECHNICAL TRANSMITTAL Support of Environmental Impact Report Proposed High-Rise Condominium Building Development Wilshire Boulevard Los Angeles, California MACTEC PROJECT Gentlemen: Pursuant to our Scope of Work (SOW) dated May 26, 2004, in connection with the Environmental Impact Report (EIR) for the property located at Wilshire Boulevard, Los Angeles, California (Site), MACTEC Engineering and Consulting, Inc. (MACTEC) is pleased to submit this Technical Transmittal describing our findings. OBJECTIVES The general objective of this phase of work is to provide analysis of the following issues: 1. Determine the settlement, if any, resulting from groundwater withdrawal after drawdown around the Site has been estimated based on the pump test results, 2. Assess liquefaction potential, and, 3. Define how groundwater flows across the Site. Additionally, MACTEC has been requested to: 4. Define the distribution of benzene, if any, at the Site.

2 RESULTS The results of this phase of the investigation are described below. This section describes settlement at the Site as it relates to the geologic and groundwater conditions, historic groundwater levels, and local offsite and onsite investigations. 1 SETTLEMENT Based on the information provided below, the groundwater levels at and in the vicinity of the Site have fluctuated, during the recent past, more than the planned depth of the Site excavation and the associated dewatering. This demonstrates that the Site has experienced more natural groundwaterlevel fluctuation than will occur when the Site is dewatered for construction. This further demonstrates that the settlement that could be caused by the planned dewatering at the Site has already occurred, and only minor settlement could occur at the Site and adjacent sites as a result of the dewatering operations at the Site. We have computed a settlement of approximately 0.2 to 0.3 inch at the Site and about 0.1 to 0.2 inch at areas adjacent to the Site. Based on prior settlement monitoring, the actual settlement that could occur at the Site and at adjacent areas will be much less than the computed settlement. In addition, the computed and actual settlement at the adjacent sites decrease with increased distance from the Site. Settlement ranging between 0.1 and 0.2 inch does not cause distress, such as surface or wall cracks in adjacent buildings, homes or streets. Consequently, the construction of the project, including dewatering, will not produce settlement or subsidence that will adversely impact the adjacent properties or streets. GEOLOGIC AND GROUNDWATER CONDITIONS The Site is located in the northwestern portion of the Coastal Plain of the Los Angeles Groundwater Basin within the physiographic feature known as the Sawtelle Plain. On a regional scale, the Sawtelle Plain is a Pleistocene-age alluvial fan that developed by alluvial dissection of the surrounding Santa Monica Plain, the surface of which now lies below the general elevation of the surrounding Santa Monica and Ocean Park Plains. The Sawtelle Plain slopes gently toward the southeast and is generally mantled by a thin veneer of younger alluvium (Dibblee, 1991 and Department of Water Resources, 1961). In the immediate Site vicinity, the exposed geologic materials consist of Pleistocene-age alluvial deposits (older alluvial-fan deposits). Locally, the Pleistocene alluvial surface has been incised by stream activity from drainage of the fan surface, resulting in low-lying drainages located along the southern edge of the older alluvial deposits. Specifically, the Site is located at the western edge of a broad low-lying drainage, one of the several drainages that have been incised into the southern edge of the upper surface of the Pleistocene fan. The drainage is in-filled with a thin veneer of Holocene-age (younger) alluvial deposits. Based on our explorations, the geologic materials underlying the Site consist of an interbedded sequence of well-graded sand, silty-sand, silt, silty-clay, and sandy-clay with some gravel to a depth of 100 feet beneath the existing ground surface (bgs). These soils form a complex multiple-

3 aquifer system at the Site which is comprised of at least seven distinct soil layers (see Figure 6). The coarse-grained soils form aquifers and the fine-grained deposits form aquitards. The upper 45 to 50 feet of materials encountered in our explorations are likely to be of Holocene age and the lower portion of the sequence is considered to be Pleistocene age. The majority of the planned excavation will be within the upper 45 to 50 feet of soils. Three small sumps will be located within the excavation at a depth of approximately 58 feet bgs. The size of the excavation is small with respect to the aerial extent of the regional complex-multiple aquifer system. The Site lies within Township 1 South, Range 15 West, Section 23, as shown on the U. S. Geological Survey, Beverly Hills, 7½-minute Quadrangle (Figure 1). The Site aquifer system is part of the much larger complex multiple-aquifer system called the Santa Monica Groundwater Sub-basin that is contiguous throughout the Los Angeles County Groundwater Basin. Groundwater flow in the Holocene deposits is southeast (see 3 Groundwater Beneath The Site, below). Data obtained from 29 wells installed by MACTEC during June 7 through 10, 2004 indicate that the depth to groundwater ranged between 24 and 30 feet below top of casing (TOC) on July 2, 2004 (see 3 Groundwater Beneath The Site, below). These depths correspond to groundwater elevations between 299 and 301 feet relative to the National Geodetic Vertical Datum of 1929 (NGVD). The elevation of the base of the planned excavation at the center of the building and the lowest sump will be approximately 281 and 269 feet NGVD, respectively. Thus for the most part, the groundwater level in the excavation will be lowered by 18 to 20 feet. At the sumps, the groundwater level will be lowered by 30 to 32 feet. HISTORIC GROUNDWATER LEVELS Groundwater levels in the past have fluctuated significantly, and hence the soils at the Site and in the immediate vicinity have already experienced multiple cycles of loading and unloading based on variations of groundwater levels. A groundwater-level fluctuation is a rise or fall in the groundwater level as measured in a well or boring. When groundwater levels fall, loading occurs and when levels rise, unloading occurs. Data supporting the evidence that groundwater levels in the past have fluctuated significantly are presented below. Table 1 is a list of groundwater levels obtained from surrounding wells and borings advanced at MACTEC project locations. Groundwater data for wells were obtained from the State of California Department of Water Resources (DWR), the California Geological Survey (CGS, formerly known as the California Division of Mines and Geology), the U. S. Geological Survey (USGS), other agencies including the County of Los Angeles, and from MACTEC Projects. Figure 1 shows the Site location, MACTEC projects, wells, and the maximum amount of observed groundwater-level fluctuation in wells. These data are summarized on Table 1. Maximum groundwater-level fluctuation for wells in the immediate vicinity of the Site (wells 15, 16, 17, 20, and 21) ranged from 19 to 139 feet. Maximum fluctuations for wells south of the Site near Culver City ranged from 12 to 47 feet. It is not known how deep the wells are and what parts of the regional complex multiple aquifer system the wells are completed in. Thus it is not known if these wells are in the same aquifer system as the Site wells. Groundwater in the shallow Holocene deposits flows under unconfined, confined, and semiconfined conditions. Groundwater levels in the vicinity of the Site are influenced by local precipitation, irrigation, and local groundwater pumping. Each of these stresses can produce groundwater-level fluctuations.

4 The historic, since the turn of the century, high groundwater level in the area of the Site is approximately 23 feet bgs (California Division of Mines and Geology, 1998). This is based on information and published data obtained from the CGS, the USGS, the DWR, monitoring data from nearby groundwater wells, and available subsurface information from nearby MACTEC geotechnical investigations. The information from California Division of Mines and Geology (1998) indicates however, that less than 1 mile south of the Site, the historic depth to groundwater was less than 10 feet. Data from a well previously constructed at the Site indicate that the high groundwater level at the Site was 17.7 feet TOC on August 6, The well with the greatest historic water-level fluctuation of 139 feet is Well ID 20 (see Table 1), State well 1S/15W-12L01 near Roxbury Park. The depth of this well is not known. The nearest groundwater monitoring well is Well ID 14, County of Los Angeles Well No. 2583B, located approximately 2,000 feet east of the Site. This well is not currently being monitored. However, groundwater-level information for the monitoring period of 1963 to 1978 is on file in the County of Los Angeles offices. Based on the available information, the groundwater level in this artesian well fluctuated during the monitoring period from 12.8 feet TOC to flowing at the ground surface during The next closest monitoring well is Well ID 17, California State Well No. 1S/R15W-24M01, located approximately 3,200 feet east of the Site. Monitoring information for this well was available for the period from 1934 to During this time period, the groundwater level fluctuated approximately 19 feet. The highest groundwater level recorded was at a depth of 45 feet in 1938 and the deepest water level was measured at a depth of 64 feet in Groundwater levels at the Site have similarly risen and fallen during this time period because the Site most likely experienced the same meteorological stresses that caused the fluctuations at well 17. This 19-foot groundwater-level fluctuation during the two-year period in well 17 represents approximately the same magnitude of decline that will be encountered at the Site when the Site is dewatered. Prior to, and since recording of these data began, there have been similar periods of groundwater-level fluctuation. As described above, another source of groundwater-level data is from previously conducted MACTEC geotechnical investigations at adjacent sites (Table 1, Site IDs 1 through 13). These sites are plotted as blue symbols on Figure 1. The borehole information from each MACTEC Project is summarized on Table 1. As a result of variation in existing grades, these data indicate that the depth and occurrence of groundwater is variable from site to site. The embedded table below contains a brief summary of groundwater levels encountered in borings that were advanced at nearby properties along Wilshire Boulevard between Comstock and Beverly Glen. These properties are shown on the aerial photograph on Figure 2. Based on our review of the geotechnical reports of these properties, the excavations at these properties did not extend below the water table. Thus, groundwater was not encountered at these sites. Geotechnical Investigations Conducted Along Wilshire Boulevard Between Beverly Glen and Comstock (see Figure 2)

5 MACTEC Project Site ID /Address/Year of Investigation Depth to Groundwater (Feet bgs 1 )/ Approximate Groundwater Elevation (Feet NGVD 2 ) 2 /865 and 875 Comstock/ / b 3 /865 and 875 Comstock/ 1960 Groundwater not encountered to 35 feet max depth drilled / soils dry above b 12 /10350 Wilshire Blvd/ /303.5 to 308 b 9a /10351 Wilshire Blvd/ 1987 Groundwater not encountered to 42 feet max depth drilled / soils dry above b Site /10250 Wilshire Blvd/ / 300 b Site /10250 Wilshire Blvd/ / 300 w3 Notes: bgs 1 - below ground surface NGVD 2 - National Geodetic Vertical Datum of Top of well casing not surveyed b - Borehole Data w - Well Data GROUND SETTLEMENT AND GROUNDWATER DEWATERING MACTEC has been involved in many projects where dewatering was used to lower the groundwater level below the bottom of planned subterranean excavation(s). Settlement monuments were used at several of these projects to measure the vertical settlement at and within the vicinity of the sites. Table 2 summarizes information from several prominent projects where the subterranean excavation extended below the groundwater table. At each of theses sites listed on Table 2, dewatering was used to lower the groundwater level below the bottom of the planned excavations to allow for construction of each building under dry conditions. A sub-drain system was constructed beneath the lower basement floor slab of each of the buildings to prevent the groundwater from entering the building basements. Each project listed on Table 2 occurred without any reported settlement problems. To our knowledge, no distress evidences caused by dewateringrelated settlement were observed at any of the existing structures adjacent to these projects. The first four projects listed on Table 2 are located on Figure 1. The approximate planned excavation and groundwater depths for the Site are shown to enable a comparison to sites in the immediate vicinity where dewatering has occurred or is occurring and to demonstrate that the Site conditions are typical for this area. The projects listed in Table 2 are 4 to 20 years old. Since MACTEC is one of the firms that would be first informed of any associated settlement problems related to the project, we have not been informed that any settlement distress caused by dewatering or the continuous groundwater withdrawal by the sub-drain systems has occurred at the project sites or at adjacent project sites. One Westwood Building: One of these sites, located within the Site vicinity, is the One Westwood Building located at Wilshire Boulevard in Westwood, California (Figure 1). One Westwood Building is 17 stories high and underlain by a 7-level subterranean base structure that encompasses the entire site. A parking structure was constructed prior to the construction of One Westwood Building near the east property line of Westwood One. The parking structure is an on-grade, 13- level structure. The lower level of the One Westwood Building base structure was established at an elevation of 230 feet NGVD and the depth of the excavation extended about 80 feet below grade

6 adjacent to the parking structure. Groundwater levels were measured at depths ranging between 42 and 46 feet below existing grade. These depths correspond to elevations ranging between 256 and 259 feet NGVD. The dewatering system placed at the One Westwood Building site lowered the water level at the site more than 30 feet, approximately 50% more than is planned at the subject Site. To measure the settlement of the adjacent parking structure during the dewatering operation of the One Westwood site, settlement monuments were placed inside the parking structure. The monuments were placed on the 18 columns of the two rows of columns adjacent to Westwood One. The settlement measurements included the vertical and horizontal movements of the columns, and the measurements were made between October 31, 1984 and September 30, Based on the settlement measurement data available to us, the vertical settlements of the columns ranged between 0.1 and 0.2 inches. Such settlements did not have any adverse effects, such as cracking, on the existing parking structure. Neither did we receive any subsidence complaints from adjacent landowners. Weyerhaeuser Atriums: This project consists of four areas where dewatering was necessary to lower the groundwater levels to below the bottom of each excavation. Prior to discharging the collected groundwater from the sub-drain systems into the nearest storm drain, the groundwater is periodically tested for a list of contaminants pursuant to the requirements of the Los Angeles Regional Water Quality Control Board (LARWQCB). MACTEC has been collecting groundwater samples at the Weyerhaeuser Atrium for the last 10 to 12 years as required by the LARWQCB. 407 North Maple Drive: This is an active site where dewatering is presently occurring via a subdrain system. The sub-drain dewatering system is currently removing approximately 420 gallons per minute (gpm) or approximately 0.6 million gallons of groundwater per day (MGD). During the initial phase of this project, the network of production wells was removing approximately 1 MGD or approximately 700 gpm. There are also two adjacent sites that are being dewatered. We are not aware of any reported adverse settlement effects due to dewatering at or adjacent to these sites. ONSITE INVESTIGATION To compute the settlements at the Site, and adjacent sites, resulting from the proposed dewatering operation, MACTEC established the lines of equal drawdown, based on the results of the pumping tests performed at the Site. As groundwater levels are drawn down, the submerged soils lose their buoyancy (loss of weight carried by water) and the weight of the previously submerged soils increases. This increase in the weight increases the vertical soil pressure on the underlying soils and causes the soils to settle. MACTEC computed the settlements at the Site and adjacent sites which would result from dewatering at the Site to lower the groundwater level below the bottom of the planned excavation, approximately 46 feet bgs. The results demonstrate that the settlement at the Site will range between 0.2 and 0.3 inches and the adjacent settlement (up to a few hundred feet from the site) will range between 0.1 and 0.2 inches at the existing grade. This settlement decreases with distance from the Site. As previously stated, such settlements will not have any adverse impacts at the Site, or the adjacent sites. However, as noted above, the vast majority of the settlement has occurred as the result of past groundwater-level fluctuations.

7 MACTEC plans to monitor and measure the settlements at the Site and adjacent sites during the dewatering operation. Based on our experience, we fully expect that the measured settlements at the monitoring points will be less than the computed settlements. CONCLUSION Based on the information provided in the section on historic groundwater levels, the groundwater levels at and in the vicinity of the Site have fluctuated during the recent past more than the planned depth of the Site excavation and the associated groundwater levels that will be encountered during dewatering. This demonstrates that: the Site has experienced at least as much groundwater-level fluctuation than will occur when the Site is dewatered, the majority of the settlement that could be caused by the planned dewatering at the Site has already occurred, and, only very minor settlement could occur at the Site and adjacent sites as a result of natural water-level fluctuation and the dewatering operations at the Site. The data obtained for offsite and onsite investigations indicate that dewatering of the Site may cause minor settlement that will not adversely impact the surrounding sites. It is our opinion that dewatering for excavation purposes and settlement between 0.1 and 0.2 inches does not cause distress, such as surface or wall cracks in adjacent buildings, homes or streets. Consequently, the proposed construction of the project, including dewatering, will not produce settlement or subsidence that will adversely impact the adjacent properties or streets. 2 LIQUEFACTION Liquefaction is a process by which water-saturated unconsolidated sediments lose their strength due to increased pore pressure during or after an earthquake. Liquefaction potential increases as the depth to groundwater decreases. The Californian Geological Survey (CGS) has been performing a comprehensive and thorough evaluation of the liquefaction potential of the soils throughout California, including the area where the Site is located. Except for some remote areas that are not developed, the liquefaction evaluation has been completed. The evaluation of the liquefaction potential is based on the geologic and soils conditions within each geologic quadrangle and on the depth to groundwater. The geologic and soils conditions are determined by exploration borings performed by CGS and by geotechnical engineering firms and the depth to groundwater is determined by water monitoring wells that were installed throughout California. Based on the information provided above, CGS determines the zones underlain by liquefiable soils and the zones underlain by non-liquefiable soils for each geologic quadrangle in California. The zones are identified by a light color for the zones underlain by unliquefiable soils and by a dark color for zones underlain by liquefiable soils. The Site is part of the Beverly Hills Quadrangle and its location is identified on Figure 3. Based on the liquefaction map presented in Figure 3, the Site is not underlain by liquefiable soils. There is no liquefaction present at the Site, and its build-out will not increase any liquefaction potential. 3 GROUNDWATER BENEATH THE SITE

8 Groundwater at the Site moves through a complex multiple-aquifer system comprised of at least seven distinct soil layers. The aquifer system consists primarily of an interbedded sequence of wellgraded sand, silty-sand, silt, silty-clay, and sandy-clay, with some gravel. The following soil properties, hydraulic conductivity (K), specific storage (S s ), and effective porosity (n e ), determine for the most part, how groundwater moves (magnitude of the rate of flow and direction of flow) and is stored in this aquifer system. Because the properties of the soils at the Site vary in direction and magnitude, this complex aquifer system is considered an anisotropic porous media. Our investigation is focused on describing how groundwater moves within the upper 55 to 70 feet of subsurface soils. Groundwater at the Site and throughout the Los Angeles region moves not as relatively fast-flowing surface water, as in a river, but as a relatively slow-moving body of subsurface water through a complex, non-homogenous and anisotropic porous media. Groundwater moves both horizontally and vertically at the Site. Static groundwater velocity rates currently vary between 0.03 and 4 feet/day across the Site. Velocity rates will increase as the excavation is constructed; early, as the excavation is deepened, groundwater velocity discharge rates will be large near the pumping wells and the excavation seepage faces. As the construction proceeds and the water table is lowered, the discharge rates and corresponding groundwater velocities will decrease. When pumping ceases, the water table will rise to its pre-pumping static position and groundwater velocity discharge rates will approach their prepumping rates. As discussed below, groundwater flow direction is generally south-southeast, but this direction also is variable. For discussion purposes, two relatively permeable zones have been identified; a shallow zone that occurs up to a depth of approximately 30 feet below ground surface (bgs), and a deep zone that occurs between approximately 40 and 55 feet bgs. It has been previously misstated that groundwater at the Site is a groundwater river flowing underground.... To more clearly define how groundwater moves at the Site, MACTEC used water levels measured in the 29 wells to construct groundwater elevation contour maps in plan and in section. These wells were constructed as a series of nine nested wells. At each location, three wells were constructed forming a nest : a shallow well was screened across the water table, a deeper well was screened across a fine-grained zone, and the deepest well was screened across the lower sand. At nest 2 (N2) one deeper well was completed. MACTEC will continue to monitor groundwater levels at the Site during dewatering. HORIZONTAL COMPONENT OF GROUNDWATER FLOW SHALLOW ZONE The depth to the water table in wells completed in the shallow zone, ranged from to feet from top of casing (TOC), elevation to feet NGVD. Figure 4 shows the horizontal component of groundwater flow in the phreatic zone, the shallowest portion of the aquifer system. This figure shows the elevation of the water table and the horizontal component of groundwater flow. The direction of groundwater movement is indicated by the red and blue arrows. Groundwater generally moves south-southeast, along a flowpath roughly parallel with the eastern boundary of the Site. The horizontal component of groundwater velocity ranges from approximately 1.5 feet/day between nests N7 and N8, to 4 feet/day between nests N1 and N7.

9 Figure 4 shows a southwest component of groundwater flow. This is partially due to the nature of the well completions that were used to construct this potentiometric surface. The nested N wells were completed using relatively short screens and gravel packs, typically less than 10 feet. Groundwater levels in these wells reflect relatively small discrete soil intervals. The pumping well, Q1, which was also included on this figure, has a longer twenty-foot screen in a gravel pack that is fully penetrating. Groundwater levels measured in Q1 represent an average of the heads in all aquifer/aquitard units tapped by this 20-foot long interval. The southwest component of groundwater flow is thus due in part to the difference in lengths of the screen/gravel packs intervals in the N and Q wells DEEP ZONE The depth to the groundwater in wells completed in the deep zone ranged from to feet from TOC, elevation to feet NGVD. Figure 5 shows the horizontal component of groundwater flow in the deep zone of the multiple aquifer system. Groundwater generally moves from north to south. A minor westerly component of groundwater flow is more prevalent in the deeper zone than in the shallow zone. VERTICAL COMPONENT OF GROUNDWATER FLOW The nested wells (N1 through N9) were constructed to monitor groundwater levels within the vertical soil column at the Site and as such were used to determine the vertical components of groundwater flow throughout the complex multiple-aquifer system. Figure 6 is a fence diagram of the Site showing lithology and groundwater elevations. It was constructed roughly parallel with the principal direction of horizontal groundwater flow. Using the July 2, 2004 water levels, this figure shows that groundwater moves predominantly horizontally within the sands and vertically in the clays. Groundwater flow in the silts is at an oblique angle. A small portion of the groundwater in the sands moves vertically downward into the underlying silts and clays. A portion of the groundwater in the silts moves vertically upward near nested well N9 and a small portion moves vertically downward. Groundwater in the middle sand unit near nested well N9 moves predominantly horizontally. The vertical component of groundwater flow ranges from approximately 0.03 to 0.30 feet/day. CONCLUSION Groundwater at the Site moves, not as a groundwater river flowing underground... or as a relatively fast-flowing river, but as a relatively slow-moving body of subsurface water through a complex, non-homogenous and anisotropic porous media. Groundwater generally moves southeast, along a flowpath roughly parallel with the eastern boundary of the Site. A minor westerly component of groundwater flow occurs in the shallow zone and is more prevalent in the deeper zone. The groundwater velocity ranges from approximately 1.5 feet/day to 4 feet/day. The vertical component of groundwater flow ranges from approximately 0.03 to 0.30 feet/day. 4 BENZENE IN GROUNDWATER Groundwater samples were collected from all nine (9) shallow wells and the pumping well (Q1). Benzene and other volatile organic compounds (VOCs), including Ethylbenzene, Toluene, and

10 Total Xylenes (BTEX) were not detected above the method detection limits. The method detection limits for all VOCs were 0.5 ug/l, except for Total Xylenes, which was 1 ug/l. CONCLUSION Benzene was not detected in groundwater samples collected at the Site. MACTEC will continue to monitor benzene in groundwater at the Site during dewatering. References: California Department of Water Resources, 1961, Planned Utilization of Groundwater Basins of the Coastal Plain of Los Angeles County, Bulletin 104, Appendix A. California Division of Mines and Geology, 1999, State of California Seismic Hazard Zones, Beverly Hills Quadrangle, Official Map released March 25, California Division of Mines and Geology, 1998, "Seismic Hazard Evaluation of the Beverly Hills 7.5 Minute Quadrangle, Los Angeles County, California" Open-File Report Dibblee, T. W., Jr., 1991, "Geologic Map of the Beverly Hills and Van Nuys (South ½) Quadrangles, California" Dibblee Geological Foundation Map DF-31. Hill, R. L., Sprotte, E. C., Chapman, R. H., Chase, G. W., Bennett, J. H., Real, C. R., Borchardt, G., and Weber, F. H., Jr., 1979, Earthquake Hazards Associated with Faults in the Greater Los Angeles Metropolitan Area, Los Angeles County, California, Including Faults in the Santa Monica Raymond, Verdugo Eagle Rock and Benedict Canyon Fault Zones, California Division of Mines and Geology, Open File Report 79-16LA. Los Angeles, City of, 1996, Safety Element of the Los Angeles City General Plan.

11 Thank you for the opportunity to submit this Technical Transmittal, and to continue working with you on this project. If you have any questions, please contact us. Sincerely, MACTEC ENGINEERING AND CONSULTING, INC. Morley J. Weitzman, R.G. AZ Senior Hydrogeologist William J. O Braitis, R.G. Principal Geologist Jake Kharraz Principal Engineer (2 copies submitted) P:\4951 Environmental\2004_proj\41071 (Fifield Realty Corp.- Wilshire-Comstock)\09.0 Project Deliverables\EIR technical transmittal final.doc

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